'Regional war has essentially begun' as US warns Iranian attack on Israel could be imminen

The US believes Iran is preparing to 'imminently launch a ballistic missile attack' against Israel and more US-based troops have been put on preparing to deploy to the Middle East. Overnight the Israeli military launched a ground operation into southern Lebanon. CNN's Kylie Atwood and Ben Wedeman report. #CNN #news Want to stay up to date on the day’s top stories? Sign up for CNN’s 5 Things newsletter, and we’ll give you the 5 biggest stories you need to know, videos people are watching, and more! Sign up here: https://www.cnn.com/newsletters/5-things?source=nl-acq_social_youtubedesc&utm_source=nl-acq_social_youtubedesc